Portable furnace



Ji P. HAYES.

Portable Furnace.

Patented-Nov. 5, 1850.

UNITED STATES PATNT ornic.

JOHN P. HAYES, OF BOSTON, MASSACHUSETTS.

PORTABLE FURNACE.

Specification of Letters Patent No. 7,765, dated November 5, 1850.

To all whom it may concern:

Be it known that I, JOHN P. HAYES, of Boston, in the county of Suffolkand State of Massachusetts, have invented certain new and usefulImprovements in Summer-Furnaces, and that the following description,taken in connection with the accompanying drawings, hereinafter referredto, forms a full and exact specification of the same, wherein I have setforth the nature and principles of my said improvements by which myinvent-ion may be distinguished from others of a similar class, togetherwit-h such parts as I claim and desire to have secured to me by LettersPatent.

The figures of the accompanying plate of drawings represent my improvedfurnace.

Figure l is an elevation of the same. Fig. 2 is a top view with thecover removed, and Fig. 3 is a vertical section taken in the plane ofthe line A, B, Fig. 2.

The object which I had in view in devising my improved summer furnace,was, to provide a heating apparatus which should perform the ordinaryculinary operations of boiling, baking, heating flatirons, &c. withoutheating the apartment in which it is placed, and to this end to have thedraft which ignites the coal in the fire pot of the furnace pass in fromthe exterior of the furnace, and then up on the side of the fire anddown through the fuel, into any cooking stove on which it may be placedcarrying the smoke with it.

My improved furnace is made of cast iron and is shaped as shown in Figs.1 and 3, being a little smaller in diameter at the bottom than at thetop. It may be set upon an ash pit a a a shaped as shown in thedrawings, and having a discharging smoke pipe Z), which may project intoa common chimney, in a manner which will be well understood, or, theupper part, independent of the ash pit, may, by means of the rim 0 c, befitted into any of the boiling spaces of a common cooking stove. A grate(Z (Z is placed or supported on this rim 0 c, on which grate the fuel issustained.

The outer periphery e e, e e is made of sufiicient height to hold aproper quantity of fuel, and is surmounted by a cap plate f f having acircular boiling space in the center thereof, which may be closed by themoveable plate 9 g at pleasure.

The whole apparatus may be moved about at pleasure by the ball h h,properly connected to the periphery e e e e, as shown in the drawings.

A draft chamber or flue is formed by the semicircular partition 2' i,set a little distance inward from the periphery e e, as shown in Fig. 3,into which air is admitted at the bottom of the furnace through theopenings at is, is in the periphery, and said air descends and escapesinto the fire chamber, above the fuel, through the openings Z, Z, Z, &c.in the beveled top of said flue or draft chamber, and then descendsthrough said fuel, with the smoke, &c. into the ash pit a, a, a, orstove on which the furnace is set. The igniting of the fuel by thisprocess, is sufficient to perform the culinary operations above referredto, and the room in which the furnace is used is not unnecessarilyheated.

By inserting a sliding damper at the top of the periphery, as shown atm, Fig. 1, the draft to the fuel may be received at the top of thefurnace, or when the furnace is set out doors, the smoke will escapethrough the opening in which this damper operates.

By having the draft air admitted from the outside and at the bottom ofthe furnace, the said air becomes heated, and produces, as is wellknown, more perfect combustion of the fuel, while at the same time itassists in heating anything on the top of the furnace.

Having thus described my improved summer furnace, I shall state my claimas follows.

What I claim as my invention and desire to have secured to me by LettersPatent is,

A summer furnace in which the draft is derived to the fire chamber fromthe eXterior of the furnace and at the bottom of the same, and passesfirst up through a flue chamber (formed between the partition 71 2' andthe periphery of the furnace as above set forth), and then down throughthe fuel, all as herein above set forth and for the purpose specified.

JOHN P. HAYES.

Witnesses; EZRA LINcoLN,

J OSEPH GAVETT.

